Milk-bottle.



M. J. DUFFY.

MILK BOTTLE.

APPLICATION FILED Nov. 27, :912.

1,146,313. l Patentedjuly 13, 1915.

CoLuMBIA PLANOGRAPH CD.,WASHINUTON, D. C,

MICHAEL zr. DUFFY, or NEW YORK, N. Y.

MILK-BOTTLE.

Specification of Letters Patent.

Patented July 13, 1915.

Application led November 27, 1912. Serial No. 733,776.

T0 all whom 'it-may concern.'

Be it known that I, MICHAEL J. DUFFY, a citizen of the United States, and resident of the city of New York, in the county of Kings and State of New York, have invented certain new and` useful Improvements in Milk-Bottles, of which the following is a specification.

This invention relates to milk-bottles and particularly to those used in milk delivery systems.

The bottles of milk, as is well known, are usually delivered to homes `at the early morning hours, and are frequently left upon stone surfaces, which happen to be'convenient, such as window sills, side-walks, door sills, etc., so that the bottles remain outdoors in such situation for a considerable length of time, until removed indoors by the occupants.

In summertime, the contact of the stone surface with the underside of the bottle causes the temperature of the milk-to be raised considerably, which is objectionable. Similarly, in wintertime, the extreme cold of the stone is transmitted to the comparatively warm milk, thereby lowering its temperature considerably, and even freezing it, which impairs the milk, at times causes the bottle to break, and is otherwise objectionable. Another disadvantage that presents itself, in winter, tothe milk bottles used at present, is that when placed in said situation the bottle becomes covered with a layer of moisture, or water globules, caused by the saturation of the air when coming in contact with the comparatively warm surface of the bottle, which warmth is derived from the milk. This development of moisture is particularly heavy at the underside of the bottle, and on the walls of the bottle for some distance from its base, due to the cold stone surface, and hence said underside often freezes to the stone, which causes the milk to become impaired or freeze, and of-` ten the bottle is caused to break. Said moisture on the walls of the bottle adjacent its base often accumulates and drips down to the bottom of the bottle where it forms an additional danger of its freezing to the stone.

The principal object of my invention is to provide a simple, inexpensive, and improved milk-bottle.

Another object is to provide a milk-bottle having means for remedying the aforesaid disadvantages. y y

A further object is to provide a milkbottle adaptable for improved sanitary cleaning.

In carrying out the invention, the interior bottom of the bottle is made in parabolic form, which is suitably proportioned, and the underside of -the bottle has a cavity formed thereby andby a surrounding circumscribing wall serving as a base for the bottle.

' I lind that giving the interior bottom of the bottle an approximately parabolic configurationprevents the accumulation thereupon of solid substances from the milk, which adhere firmly to the bottom surfaces of all other milk-bottles used at present, and hence this form is conducive to thorough cleaning and renders the bottlemore sani-l tary. Said air cavity insulates the milk against the excessive warmth of the stone in summer, and against its extreme cold in winter, whereby the temperature of the milk is maintained longer and uniform throughout, and its impairment or freezing prevented. The underside of the bottle being maintainedv elevated and away from the surface of the stone, by said wall circumscribing the cavity, prevents its freezing to the stone. Besides being conducive to increased sanitation,- said parabolic form also gives to the lower portion of the bottle-wall in conjunction vwith 'its vertical exterior a triangular form, which properly insulates the exterior surface of said portion against being warmed by the milk, sor that little ork no saturation takes place thereupon, and consequent dripping of moisture to the base of the bottle is prevented and its freezing to the stone thus further precluded.

Other objects and advantages will hereiny after appear.

The accompanying drawing shows a sectional elevation, taken through the longitudinalcenter line ofthebottle.

The exterior ofthe bottle is preferably formed similarly to a conventional milkbottle, and consists of a cylindrical wall 1 extending from the base 2 to about twothirds of the height of the bottle, and from there curves gradually into the configuration of a neck 3, suitably proportionedpto be grasped conveniently b-y the user. At the top of the neck is formed a rim 4, serving lll) as a reinforcement, which has a recessed portion 5 providing a seat 6 upon which a circular cardboard or other suitable cover, not shown, seals the contents. At the upper portion of the bottle the glass wall is of suitable uniform thickness, so that the interior thereat follows the general configuration of the exterior. 1

The interior botto-1n 7 of the bottle has the form of a parabola, or a general parabolic configuration, the vertex 7EL of which con stitutes the lowest portion of the interior. In the preferred form the axis of the parabola coincides withthe longitudinal centerl line of the bottle, the base of the parabola is equal to the inside diameter of the bottle at 8 and merges with the interior wall at 9, and the height of the parabola, or distance from 10 to 7 is about the same as the parabola-base, or said inside diameter.` At the underside 11 of the bottle is provided a cavity 12 formed thereby and by a circumscribing annular wall 13, which is sufficiently thick to serve as a base 2 for the bottle. ln practice, the depth of said cavity from un derside 11 to base 2 is about one inch, and from the lowest point 14e of the parabolic portion 15, which protrudes within cavity 12, to the base 2 is about half an inch. This parabolic configuration of the bottom 7 'of the bottle prevents objectionable accumulation of dry substances from the milk upon its surface, and enables thorough sanitary cleansing thereof. lt furthermore gives to the lower portion of the bottle, with relation to the vertical exterior' wall 1, a properly adapted triangular form, which commences at about 9 and increases in thickness gradually downward. rlhis prevents the exterior surface of said lower portion being warmed by the milk, whereby dripping of moisture at said lower portion, caused by saturation of the cold air thereagainst in wintertin'ie, is avoided and freezing of the bottle to the surface it is placed upon is precluded. The cavity 12 at the underside of the bottle insulates the milk against the extreme cold of the surface upon which the bottle is placed, thereby maintaining the temperature of the milk longer, more uni-v form, and preventing its freezing; and the circumscribing wall 13 in thus raising'the underside 11 of the bottle prevents its freezing to the surface placed upon.

Vhaving' its side wall triangular in cross section and adaptable to protect the milk thereat against extreme degrees of temperature of vthe surface upon which the bottle rests, the

interior bottom of the bottle joining the interior of the sidewall in the configuration of a suitably adapted parabola, said lower portion ofthe wall bounded by a vertical exterior,l a horizontal underside,and an oblique substantially straight interior, and the underside of the bottle having a surrounding wall to elevatesaid lower portion.

2. A. glass milk-bottle adaptable for delivery systems having Aits sidewall at its lower portion triangular in cross section to protect the milk thereat against the temperaturer of the surface upon which the bottle rests, said lower portion of the wall bounded by a vertical exterior, a horizontal underside, and an oblique substantially straight interior, vand thehorizontal undersideof said lower portion of the wall being elevated above the surfaceupon which the bottle rests. 1 f

3. ln a glass milk-bottle adaptable for delivery systems, the lower linterior bottom portion of the `bottle having an approximately parabolic form, said portion having its side wall triangular in cross section and adapted toy protect the milk thereat against temperature extremes, said lower portion of the wall bounded by a vertical exterior, a horizontal underside, land an oblique substantially straight interior, and the underside `of the bottle-having a surrounding wall adapted to elevatethe exterior bottom of the bottle 'and-forming-an air cavity below said bottom adapted to elevate and insulate the contents within said parabolic portion against the temperature of the surface upon which the bottle rests. v

- Signed at the city of New York, in the county of Kings, rand State of New York, this 25th day of November, A.. D. 1912.

l y `MlCHAEL J. DUFFY. litnesses: B. ROMAN,

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Viashington,.119.` C. f 

